Legacy of the Silver Shadow (2002)

Josh, Alex, Campbell, and Gretel are four ordinary kids who are thrown together when they discover the Silver Shadow, a long-forgotten dead superhero. Although defeated in the 1950s by his arch enemy, The Crab, the Silver Shadow lives on as a digital recording in an old computer. Reactivated by the kids, the Shadow convinces them to take up his battle against evil and injustice.